Effect of Ferrite Content on High-Temperature Strength of 12% Chromium Steels with a Ferritic-Martensitic Structure

The structure and mechanical properties of a number of experimental 12% chromium steels of the ferritic-martensitic class are studied, whose prototypes are two domestic heat-resistant steels EP-450 (12Kh12М2BFR) and EP-823 (16Kh12МVSFBR). The possibility is demonstrated of using isothermal hardening...

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Bibliographic Details
Published in:Metallurgist (New York) 2018, Vol.61 (9-10), p.758-764
Main Authors: Belomytsev, M. Yu, Obraztsov, S. M., Molyarov, A. V.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemical elements
Chemistry and Materials Science
Chromium (Metal)
Chromium steels
Cooling
Decomposition
Ferrite
Ferritic stainless steels
Heat resistance
Heat resistant steels
Hot pressing
Iron compounds
Martensite
Martensitic stainless steels
Materials Science
Mechanical properties
Metallic Materials
Steel
Steel structures
Structural steels
Temperature
Thermal stability
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Summary:The structure and mechanical properties of a number of experimental 12% chromium steels of the ferritic-martensitic class are studied, whose prototypes are two domestic heat-resistant steels EP-450 (12Kh12М2BFR) and EP-823 (16Kh12МVSFBR). The possibility is demonstrated of using isothermal hardening for controlling the quantitative ratio of martensite and ferrite in test steel structure, characterized by considerable austenite thermal stability. It is established that ferrite content in the original steel structure has a specific unfavorable effect on high-temperature strength.
ISSN:0026-0894
1573-8892
DOI:10.1007/s11015-018-0560-y